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    <script>
        //利用函数计算1-100之间的累加和
        //1.声明函数
        function getSum(){
            var sum = 0;
            for(var i = 1;i<=100 ;i++){
                sum +=i;
            }
            console.log(sum);
        }
        //2.调用函数
        getSum();
        getSum();

    </script>
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